package com.haiwen.filter;

import com.haiwen.pojo.users;
import com.haiwen.utils.UserContext;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter(filterName = "userFilter",urlPatterns = {"/Backstage/private/*"})
public class userFilter implements javax.servlet.Filter {
    public void destroy() {
    }
    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {
       HttpServletRequest request= (HttpServletRequest)req;
        HttpServletResponse response=(HttpServletResponse) resp;
       Object attribute = request.getSession().getAttribute(UserContext.USER_IN_SESSION);
        if (attribute==null){
            response.sendRedirect(request.getContextPath()+"/Backstage/admin_login.html");
        }
        chain.doFilter(req,resp);
    }

    public void init(FilterConfig config) throws ServletException {

    }

}
